No problem, your game so you get to decide how the jump should work :) And "mario style" jump where holding the button determines jump heigt is a good idea, i'll see what its like whenever you add it then.
Yeah random ammo position could be cool since you plan this to be mainly multiplayer, can prevent having people camp on known ammo spawn points so good planning there XD. The kitchen themed weapons is a really neat idea ! especially if you go wild with it and make some creative weapons out of it :p (even if its a different gameplay, you could totally have crazy weapons the likes of team17's Worms) eventhough i think the classics are a bit unavoidable for these games still you can have them fit the theme. Parralax scrolling would be cool too for sure ^^ and the character generator will also definitively add to the humor, curious to see what you'll come up with there.
No problem dude, i usually reply a bit late but whenever i can i try to go give some feedback on the projects i follow here, i think it's part of the indie experience to go and help out eachother and (hopefully) feedback contributes to that in a way :p